Thomas ishebwood



(No Modell;

T. ISHERWOOD.

WEPT STOP MECHANISM FQR LOOMS.

No. 288,814. Patented Nov. 20, 1883.

- 8 VIN 705;

N PETERS. FhMo-Lzllwgnaner, Washingmm n. C.

UNITED STAT PATENT FFICE.

THOMAS ISHERWOOD, OF YVESTERLY, RHODE ISLAND.

WEFT STOP MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 288,814, dated November 20, 1883.

Application filed September 8, 1882.- (No model.)

To all whom it may concern:

Be it known that I, Tnorms Isnnnwoon,

. of IVesterly, in the county of \Vashington and class of automatic sto auctions used on looms, by means of which the absence of the weft or filling thread is detected, and the loom is stopped by disengaging any suitable mechanism by which the belt is moved from the tight to the loose pulley, or by which the loom is stopped by any other means.

In some forms of stop mechanism for looms as heretofore constructed the weft-fork does not touch the weft or filling thread with sufficient sensitiveness, but bears on the thread with sufficient force to carry the same at times through the warp, and thus is liable to stop the loom at times when a weft-thread is properly laid. Another defect in some forms of stop mechanism as heretofore constructed is that the weft-fork does not rise before the shuttle completes its traverse, and therefore prevents the weft from being laid in the shed with the tension required to make an even cloth.

My present invention is intended to overcome these difficulties; and it consists in the novel construction, hereinafter claimed, of the mechanism by which the weft fork or feeler is operated.

In the accompanying drawings, Figure 1 is a'perspective view of my improved weft stop mechanism, the breast-beam and the lay-beam of a loom being shown in broken lines. Fig.

' 2 is a sectional view of the lay-beam, showing the improved stop mechanism secured thereto. In this figure the mechanism is shown in solid lines in the position occupied when the lay is farthest from the breast-beam and V the shuttle is passing through the shed, and in broken lines in the position occupied when the fork has failed to find a weft-thread and the dagger is raised so as to strike the disengaging mechanism to stop the loom.

In the drawings, A is the breast-beam of a loom.

B is the lay-beam.

G is a bracket secured to the breast-beam, to the end of which the bolster c is secured.

E is a plate secured to the lay-beam, on which the main parts of this stop mechanism are secured. On this plate the stops 6 and e, by which the motion of the dagger F is limited, and also the stop 6, which limits the rise of the raising-lever K, are formed or secured.

F is the dagger, which, when in the raised position shown in broken lines in Fig. 2, comes in contact with anyone of the various devices now used in connection with stop-motions for looms and causes the loom to be stopped. Such mechanism, being well known in the art, is not shown in the drawings, as it forms no part of this invention. The dagger F is pivotally connected with the plate E, and is pro vided with the extension f and the locking arm f.

G is avertical slide provided with slots 9 9, through which pins or screws m or pass into plate E, forming studs on which the slide G moves vertically. On its upper end the shoulder g is formed, which, whenthe slide is raised, comes in contact with the pin it on the arms H, pivoted on plate E, the slotted front end of which engages with a pin, 2', which projects from an extension of the arm h of the weft fork or feeler, so that when the slide G is raised the shoulder g raises the arm H, and through the same the weft fork or feeler I. On the slide G the wedge is secured, which, when the slide descends, passes on either one or the other side of the locking-arm f, and thus locks the dagger in the position it may then occupy, so that it cannot be displaced until the slide G is raised again.

K is a lever, the end of which bears against the lower extension of slide G, and by the movement of this lever the slide G is raised. It is pivoted to the plate E and connected with the laybeam by the flexible strap L. The weft-fork arm if is connected with the dagger by the wire 7L3, which has the'nut h" near its lower end, which nut comes in contact with the dagger only when the weft-fork, in its descent, has nearly reached the weft-thread.

The operation of the device is as follows:

IOO

been laid in the shed bythe shuttle.

When the layof the loom moves rearward or awayfrom the breast-beam and has nearly reached the end of its backward motion, the flexible strap L comesin contact with the bolster c, which elevates the lever K and quickly raises the slide G, the shoulder g on which, by coming in contact with the pin h, swings the arm H on its pivot and raises the weft-fork I, as is shown in Fig. 2 in solid lines, and allows the shuttle to pass through the open shed beneath said weft fork or feeler. When the lay moves toward the breast-beam, the strap L straightens and the arm K moves downward,

thus permitting slide G to descend. As the slide descends, the weft-feeler falls gradually to feel for the weft-thread, which should have If the weft be absent, the feeler will descend into the recess formed in the top of the lay-beam, and

the strap L and bolster c.

as it completes its descent will raise the end of the dagger F by means of the wire it and nut h the whole motion being controlled by As the action of the strap and bolster is to raise the lever K first slowly, and then increasing rapidly, so the weft-fork rises first slowly, and then increasing rapidly, while it descends at first quickly and completes its descent slowly, so as to reach the weft without any momentum. The mechanism can be adjusted to feel for the weft-thread before the shuttle has completed its traverse by the adjustment of the bolster cwith reference to the lay-beam, so that the strap L shall be caused to leave the bolster c at the proper time in the forward movement of the lay.

I make my weft-fork shorter than has been heretofore the practice, so that it will pass off from the weft-thread before the shuttle has completed its traverse; andto prevent the weft-fork, when it leaves the weft,-from descending and raising the dagger, I lock the dagger by means of the stop or wedge g on the slide G, which in the descent of the slide passes behind the locking-arm f when aweftthread has been found in place. When, by the absence of the weft-thread, the dagger has been raised into position to come in contact with the shipper mechanism, the dagger is also locked by this stop coming in front of the armf, as is shown in broken lines in Fig. 2, and therefore will resist "any blow required to move or unlatch the shipper mechanism.

Thebolster c is secured to the bracket 0 by a nut, 12, on a bolt which passes through a slot in an arm or extension of the bolster, said bolt being secured to bracket 0, so that the same can be readily adjusted and the motion of the weft-fork controlled, as above described. The dagger may operate to stop the loom by mechanism suchas is shown in patent to Taylor, No. 151,727, of June 9, 1874, or by other known means.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with the weft-fork, the dagger having a locking-arm, f, and means for connecting the dagger with the weft-fork,

of a slide constructed to operate the weft-fork, and provided with the stop constructed to lock the dagger, and means for operating said slide, substantially as described.

2. The combination, with the weft-fork I, the hinged arm H, the slide G, the dagger F, means for connecting the dagger with the weftfork, and the lever K, of the bolster 0, means for supporting said bolster, and the flexible strap L, substantially as described.

3. The combination, with the plate E and the stops 6 6 6 of the lever K, the dagger F, the fork or feeler I, the arm H, the slide G, means for operating the lever K, and connecting devices between the dagger and weft fork or feeler, substantially as described.

4. The combination, with the weft-fork and dagger and means for connecting the same, of a flexible strap and fixed bolster, means for supporting said bolster, and means for connecting the strap with the weft-fork, as described.

In witness whereof I have hereunto set my hand. H

THOMAS ISHERWVOOD. Vitnesses: V

M. F. BLIGI-I, J. A. MILLER, J r. 

